Ca(OH)2 is added to a large beaker of water. How is the solution different from the original water?A...The solution turns blue litmus to red.

B...The solution turns phenolphthalein pink.

C...The solution has more hydrogen ions.

D....The solution has fewer hydroxide ions.

Answers

Answer 1

Answer: When Ca(OH)₂ is added to a beaker of water the solution would turn phenolphthalein pink. Phenolphthalein is a common indicator and is only pink when in basic solutions. By adding calcium hydroxide, you are turning the solution into a basic solution since the concentration of OH⁻ ions is going up and therefore any phenolphthalein in solution would turn pink.
(answers A,C, and D would happen if you added an acid to the water such as HCl)
I hope this helps. Let me know if anything is unclear.

Answer 2

Answer:

Ca(OH)2 is added to a large beaker of water. The solution different from the original water are the solution turns blue litmus to red, will has more hydrogen, and has fewer hydroxide ions.

What is a solution?

A solution is a mixture of two or more solute into solvents. Solution is made by mixing of two or more molecules.

For example, is a solution of water and salt.

Thus, the correct option is A, C, and D.

Learn more about solution

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Is BH2F a gas or a liquid and what is the boiling point

Answers

Hey I tried but could not find your answer, but maybe you could try to calculate the average of bpts of the different elements in the compound to find the boiling point. And when you know the bpt, you can find out whether it is a liquid or gas. But after searching a lot, I found it was a solid. Good luck!

A mixture of CH4 and H2O is passed over a nickel catalyst at 1000 K. The emerging gas is collected in a 5.00-L flask and is found to contain 8.62 g of CO, 2.60 g of H2, 43.0 g of CH4, and 48.4 g of H2O.

Answers

The given question is incomplete. But the complete question is this:

A mixture of $CH_(4)$ and $H_2O$ is passed over a nickel catalyst at 1000 K. The emerging gas is collected in a 5.00-L flask and is found to contain 8.62 g of CO, 2.60 g of $H_2$ , 43.0 g of $CH_(4)$ , and 48.4 g of $H_(2)O$ . Assuming that equilibrium has been reached, calculate $K_(p)$ for the reaction.

Explanation:

As the given reaction is as follows.

$CH_4 + H_2O \rightarrow CO + 3H_2$

And, we know that

No. of moles = $\frac{mass}{\text{molar mass}}$

Therefore, calculate the moles as follows.

Moles of $CH_4$ = $(43)/(16.04)$

= 2.6808 mol

Moles of $H_2O$ = $(48.4)/(18.01528)$

= 2.6866 mol

Moles of CO = $(8.62)/(28.01)$

= 0.307747 mol

Moles of $H_(2)$ = $(2.6)/(2.01588)$

= 1.2897 mol

As, we know that

Concentration = $(moles)/(volume (L))$

Given volume = 5 L

Hence, calculate the concentration of given species as follows.

Conc. of $CH_4 = (2.6875)/(5)$

= 0.5361

Conc. of $H_2O = (2.6889)/(5)$

= 0.5373

Conc. of CO = $(0.307747)/(5)$

= 0.06155

and, Conc. of $H_2 = (1.2897)/(5)$

= 0.2579

Now, expression for equilibrium constant for the given reaction is as follows.

$K_(c) = ([CO][H_2]^(3))/([CH_4][H_2O])$

Now, putting the given values into the above formula as follows.

$K_(c) = ([0.06155][0.2579]^(3))/([0.5361][0.5373])$

$K_(c) = 3.665 * 10^(-3)$

Also, we know that

$K_p = K_c * (RT)^dn$

Consider the equation

$CH_4(g) + H2O(g) \rightarrow CO(g) + 3H_2(g)$

Calculate change in moles of gas as follows.

change in gas moles (dn) = 1 + 3 - 1 - 1

dn = 2

As, $K_p = K_c * (RT)^2$

It is given that,

T = 1000 K, R = 0.0821

So,

$K_p = 3.665 * 10^(-3) * (0.0821 * 1000)^(2)$

$K_p$ = 24.70

Thus, we can conclude that value of $K_(p)$ for the reaction is 24.70.

Explain a polar molecules and give examples

Answers

Ethanol is polar because the oxygen atoms attract electrons because of their higher electronegativity than other atoms in the molecule. Thus the -OH group in ethanol has a slight negative charge. Ammonia (NH3) is polar. Sulfur dioxide (SO2) is polar.

Which of the following is true for compounds?They can be separated into their component elements through physical means.
They can be created by chemical reactions.
They can consist of no more than two types of elements.
They all have the same properties regardless of their elemental composition.

Answers

They can be created by chemical reactions.

Compounds have varying properties, depending on the compounds they are made from, and are created by chemical reactions.

Answer: The correct option is that the compounds are created by chemical reactions.

Explanation:

Option 1: Elements combine chemically in a specific ratio to form compounds. They can't be separated by physical methods like filtration. For example, $H_2O$ is made up 2 H-atoms and 1 O-atom. When we filter water through normal filtration, we do not obtain H-atom and O-atom separately, but we get combined form of hydrogen and oxygen atom that is $H_2O$ .

Option 2: Compounds are formed when two or more elements combine chemically.

$2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$

Option 3: Compounds can have more than two types of elements. For example, In $CaCO_3$ , 3 elements are present - Calcium(Ca), Carbon(C), Oxygen(O).

Option 4: Compounds formed have different properties from one another. There can be difference in physical properties as well as chemical properties. For example, $H_2O$ (water) and $CaCO_3$ (calcium carbonate) are two compounds. Water is present in liquid state and calcium carbonate is present in solid state. Hence, it showed that all the compounds cannot have same properties.

Granite forms when magma cools slowly underground. Granite _____.a. has small crystals
b. is an intrusive igneous rock
c. is an organic sedimentary rock
d. forms from regional metamorphism

Answers

Granite forms when magma cools slowly underground. Granite is an intrusive igneous rock. The answer is letter B. granite is composed mostly of quartz and feldspar with minor amounts of mica, amphiboles and other minerals.

For the chemical reaction C2H6 + 137 kJ C2H4 + H2, the chemical energy of thea. reactant is greater than the chemical energy of the products.
b. products is greater than the chemical energy of the reactant.
c. reactant and the chemical energy of the products are equal.
d. reaction is conserved.

Answers

The reaction C₂H₆+137kJ→C₂H₄+H₂ is endothermic since the energy is being absorbed by the reaction and not released. We know this by the fact that the energy is on the reactants side of the reaction. If the energy was on the products side of the reaction we would call it exothermic since energy would be being released. Since this reaction is endothermic we know that the products will have more energy than the reactants which means that the answer is B.

(the equation in the question does not have an arrow in it so I assumed it was between the 137kJ and C₂H₄).

I hope this helps. Let me know if anything is unclear.

Answer:

The chemical energy of C2H4 and H2 is greater than the chemical energy of C2H6 .

Explanation:

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